ascon-trng.h

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/*
 * Copyright (C) 2022 Southern Storm Software, Pty Ltd.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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 */
 
#ifndef ASCON_TRNG_H
#define ASCON_TRNG_H
 
#include <ascon/permutation.h>
#include "ascon-select-trng.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define ASCON_SYSTEM_SEED_SIZE 32
 
typedef struct
{
    unsigned posn;
 
#if defined(ASCON_TRNG_MIXER)
    ascon_state_t prng;
 
    #define ASCON_TRNG_MIXER_RATE 8U
#endif
 
} ascon_trng_state_t;
 
int ascon_trng_generate(unsigned char *out, size_t outlen);
 
int ascon_trng_init(ascon_trng_state_t *state);
 
void ascon_trng_free(ascon_trng_state_t *state);
 
uint32_t ascon_trng_generate_32(ascon_trng_state_t *state);
 
uint64_t ascon_trng_generate_64(ascon_trng_state_t *state);
 
int ascon_trng_reseed(ascon_trng_state_t *state);
 
#ifdef __cplusplus
}
#endif
 
#endif